fix error 500

fichero_printer/fichero/printer.py

@@ -162,6 +162,16 @@ class RFCOMMClient:
                 loop.sock_connect(sock, (self._address, self._channel)),
                 timeout=10.0,
             )
+        except asyncio.TimeoutError as exc:
+            sock.close()
+            raise PrinterTimeout(
+                f"Classic Bluetooth connection timed out to {self._address} (channel {self._channel})."
+            ) from exc
+        except OSError as exc:
+            sock.close()
+            raise PrinterError(
+                f"Classic Bluetooth connection failed for '{self._address}' (channel {self._channel}): {exc}"
+            ) from exc
         except Exception:
             sock.close()
             raise